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  <title>The SplMaxHeap class</title>

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 <h1 class="title">The SplMaxHeap class</h1>
 
 
 <div class="partintro"><p class="verinfo">(PHP 5 &gt;= 5.3.0)</p>
 

  <div class="section" id="splmaxheap.intro">
   <h2 class="title">简介</h2>
   <p class="para">
    The SplMaxHeap class provides the main functionalities of a heap, keeping the maximum on the top.
   </p>
  </div>

 
  <div class="section" id="splmaxheap.synopsis">
   <h2 class="title">类摘要</h2>
 

   <div class="classsynopsis">
    <div class="ooclass"></div>
 


    <div class="classsynopsisinfo">
     <span class="ooclass">
      <strong class="classname">SplMaxHeap</strong>
     </span>

     <span class="ooclass">
      <span class="modifier">extends</span>
      <a href="class.splheap.html" class="classname">SplHeap</a>
     </span>

     <span class="oointerface">implements 
      <span class="interfacename"><strong class="interfacename">Iterator</strong></span>
     </span>

     <span class="oointerface">, 
      <span class="interfacename"><a href="class.countable.html" class="interfacename">Countable</a></span>
     </span>
 
     {</div>

 
    
 
    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 方法 */</div>
    <div class="methodsynopsis dc-description">
   <span class="modifier">protected</span> <span class="type">int</span><span class="methodname"><a href="splmaxheap.compare.html" class="methodname">compare</a></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value1</code></span>
   , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value2</code></span>
   )</div>


    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 继承的方法 */</div>
    <div class="methodsynopsis dc-description">
   <span class="modifier">abstract</span> <span class="modifier">protected</span> <span class="type">int</span><span class="methodname"><a href="splheap.compare.html" class="methodname">SplHeap::compare</a></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value1</code></span>
   , <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value2</code></span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">int</span><span class="methodname"><a href="splheap.count.html" class="methodname">SplHeap::count</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="splheap.current.html" class="methodname">SplHeap::current</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="splheap.extract.html" class="methodname">SplHeap::extract</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="splheap.insert.html" class="methodname">SplHeap::insert</a></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$value</code></span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">bool</span><span class="methodname"><a href="splheap.isempty.html" class="methodname">SplHeap::isEmpty</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="splheap.key.html" class="methodname">SplHeap::key</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="splheap.next.html" class="methodname">SplHeap::next</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="splheap.recoverfromcorruption.html" class="methodname">SplHeap::recoverFromCorruption</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">void</span><span class="methodname"><a href="splheap.rewind.html" class="methodname">SplHeap::rewind</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">mixed</span><span class="methodname"><a href="splheap.top.html" class="methodname">SplHeap::top</a></span>
    ( <span class="methodparam">void</span>
   )</div>
<div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="type">bool</span><span class="methodname"><a href="splheap.valid.html" class="methodname">SplHeap::valid</a></span>
    ( <span class="methodparam">void</span>
   )</div>

   }</div>
 
  </div>



 
 </div>
 
 






<h2>Table of Contents</h2><ul class="chunklist chunklist_reference"><li><a href="splmaxheap.compare.html">SplMaxHeap::compare</a> — Compare elements in order to place them correctly in the heap while sifting up.</li></ul>
</div>
<hr /><div class="manualnavbar" style="text-align: center;">
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 <div class="next" style="text-align: right; float: right;"><a href="splmaxheap.compare.html">SplMaxHeap::compare</a></div>
 <div class="up"><a href="spl.datastructures.html">数据结构</a></div>
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